adding Wasm-bindgen

.gitignore

@@ -1,2 +1,3 @@
-/target
+target
 **/*.rs.bk
+node_modules

Cargo.lock

@@ -9,6 +9,7 @@ dependencies = [
  "gc_derive 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -16,6 +17,16 @@ name = "bitflags"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "bumpalo"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "chrono"
 version = "0.4.6"
@@ -68,11 +79,24 @@ name = "itoa"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "lazy_static"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "libc"
 version = "0.2.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "log"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.39"
@@ -86,11 +110,27 @@ name = "num-traits"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "proc-macro2"
+version = "0.4.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "quote"
 version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "quote"
+version = "0.6.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rand"
 version = "0.5.5"
@@ -151,6 +191,16 @@ dependencies = [
  "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "syn"
+version = "0.15.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "synom"
 version = "0.11.3"
@@ -183,6 +233,59 @@ name = "unicode-xid"
 version = "0.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unicode-xid"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "wasm-bindgen-macro 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bumpalo 2.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-shared 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-macro-support 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-backend 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasm-bindgen-shared 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "winapi"
 version = "0.3.6"
@@ -204,6 +307,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
 "checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
+"checksum bumpalo 2.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4639720be048090544634e0402490838995ccdc9d2fe648f528f30d3c33ae71f"
+"checksum cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
 "checksum chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "45912881121cb26fad7c38c17ba7daa18764771836b34fab7d3fbd93ed633878"
 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
@@ -211,10 +316,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum gc 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "630b15fafc2270fc89de904da9ebb8b950642a5ed7bd99ec3f95558b0831ea9a"
 "checksum gc_derive 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "2501c15cbaf28a0c2214617aa85351982a933161d7937fe6cd71c855364e0ea6"
 "checksum itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
+"checksum lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bc5729f27f159ddd61f4df6228e827e86643d4d3e7c32183cb30a1c08f604a14"
 "checksum libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)" = "76e3a3ef172f1a0b9a9ff0dd1491ae5e6c948b94479a3021819ba7d860c8645d"
+"checksum log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"
 "checksum num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)" = "e83d528d2677f0518c570baf2b7abdcf0cd2d248860b68507bdcb3e91d4c0cea"
 "checksum num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0b3a5d7cc97d6d30d8b9bc8fa19bf45349ffe46241e8816f50f62f6d6aaabee1"
+"checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
 "checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
+"checksum quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)" = "faf4799c5d274f3868a4aae320a0a182cbd2baee377b378f080e16a23e9d80db"
 "checksum rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e464cd887e869cddcae8792a4ee31d23c7edd516700695608f5b98c67ee0131c"
 "checksum rand_core 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1961a422c4d189dfb50ffa9320bf1f2a9bd54ecb92792fb9477f99a1045f3372"
 "checksum rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0905b6b7079ec73b314d4c748701f6931eb79fd97c668caa3f1899b22b32c6db"
@@ -223,10 +332,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)" = "15c141fc7027dd265a47c090bf864cf62b42c4d228bbcf4e51a0c9e2b0d3f7ef"
 "checksum serde_json 1.0.32 (registry+https://github.com/rust-lang/crates.io-index)" = "43344e7ce05d0d8280c5940cabb4964bea626aa58b1ec0e8c73fa2a8512a38ce"
 "checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
+"checksum syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)" = "a1393e4a97a19c01e900df2aec855a29f71cf02c402e2f443b8d2747c25c5dbe"
 "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
 "checksum synstructure 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3a761d12e6d8dcb4dcf952a7a89b475e3a9d69e4a69307e01a470977642914bd"
 "checksum time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "d825be0eb33fda1a7e68012d51e9c7f451dc1a69391e7fdc197060bb8c56667b"
 "checksum unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
+"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+"checksum wasm-bindgen 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)" = "546e4ab1bf7f9a3532d21472efd72d01a23f55abd885c60b165f393394dbad95"
+"checksum wasm-bindgen-backend 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)" = "7b84bedebfd6ae3522cce59dec6b52ee6c53ceeaae8541668c15b9f42df8ecab"
+"checksum wasm-bindgen-macro 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)" = "f2a033fc6bfd5e486a488b0e19d7d1bb29e667ebb91db85f698381a8aa831786"
+"checksum wasm-bindgen-macro-support 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)" = "fba68375ef8f095c4a169c093c95ed2e1b5e44f7872f3bcbcafe2c51b4a80480"
+"checksum wasm-bindgen-shared 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)" = "321949f4d7f7bf7a49dccd464bdc46581b180f761d9505e4943926d50b2a4a64"
 "checksum winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

Cargo.toml

@@ -16,8 +16,10 @@ gc_derive = "0.3.2"
 serde_json = "1.0"
 rand = "0.5.5"
 chrono = "0.4"
+wasm-bindgen = "0.2.43"
 
 [lib]
+crate-type = ["cdylib", "lib"]
 name = "boa"
 path = "src/lib/lib.rs"
 

README.md

@@ -1,24 +1,39 @@
 ### Boa
+
 This is an experimental Javascript lexer, parser and Just-in-Time compiler written in Rust. Currently, it has support for some of the language.  
 [![Build Status](https://travis-ci.com/jasonwilliams/boa.svg?branch=master)](https://travis-ci.com/jasonwilliams/boa)
 [![](http://meritbadge.herokuapp.com/boa)](https://crates.io/crates/boa)
 [![](https://docs.rs/Boa/badge.svg)](https://docs.rs/Boa/)
 
-
 This project is an attempted rewrite of Bebbington's js.rs. Most of the Rust code has been rewritten from scratch.
 
+#### WASM
+
+This interpreter can be exposed to javascript!
+You can build the example locally with:
+
+```
+$ yarn install
+$ yarn serve
+```
+
+In the console you can use `window.evaluate` to pass JavaScript in
+
 #### Roadmap
-* ~string.length~ - works in 0.1.5
+
-* Adding support for constructors
+- ~string.length~ - works in 0.1.5
-* Better error output
+- Adding support for constructors
-* Passing [test262](https://github.com/tc39/test262)
+- Better error output
+- Passing [test262](https://github.com/tc39/test262)
 
 #### Usage
-* Checkout this project
+
-* Build `cargo build`
+- Checkout this project
-* `cargo run`
+- Build `cargo build`
-* You can make changes to tests/js/test.js and build again
+- `cargo run`
-* If any JS doesn't work its a bug! Please raise an issue
+- You can make changes to tests/js/test.js and build again
+- If any JS doesn't work its a bug! Please raise an issue
 
 #### Example
+
 ![Example](docs/img/boaTest.gif)

index.js

@@ -0,0 +1,9 @@
+// Note that a dynamic `import` statement here is required due to
+// webpack/webpack#6615, but in theory `import { greet } from './pkg/hello_world';`
+// will work here one day as well!
+const rust = import("./pkg/boa");
+
+rust.then(m => {
+  window.evaluate = m.evaluate;
+  m.evaluate('var a = "hello"; a;');
+});

package.json

@@ -0,0 +1,14 @@
+{
+  "scripts": {
+    "build": "webpack",
+    "serve": "webpack-dev-server"
+  },
+  "devDependencies": {
+    "@wasm-tool/wasm-pack-plugin": "0.2.1",
+    "text-encoding": "^0.7.0",
+    "html-webpack-plugin": "^3.2.0",
+    "webpack": "^4.29.4",
+    "webpack-cli": "^3.1.1",
+    "webpack-dev-server": "^3.1.0"
+  }
+}

src/bin/bin.rs

@@ -1,23 +1,8 @@
 extern crate boa;
-use boa::exec::{Executor, Interpreter};
+use boa::exec;
-use boa::syntax::lexer::Lexer;
-use boa::syntax::parser::Parser;
 use std::fs::read_to_string;
 
 pub fn main() {
     let buffer = read_to_string("tests/js/test.js").unwrap();
-    let mut lexer = Lexer::new(&buffer);
+    exec(buffer);
-    lexer.lex().unwrap();
-    let tokens = lexer.tokens;
-
-    // Setup executor
-    let expr = Parser::new(tokens).parse_all().unwrap();
-    // print!("{:#?}", expr);
-
-    let mut engine: Interpreter = Executor::new();
-    let result = engine.run(&expr);
-    match result {
-        Ok(v) => print!("{}", v),
-        Err(v) => print!("Error: {}", v),
-    }
 }

src/lib/lib.rs

@@ -1,7 +1,7 @@
+extern crate chrono;
 extern crate gc;
 extern crate rand;
 extern crate serde_json;
-extern crate chrono;
 
 #[macro_use]
 extern crate gc_derive;
@@ -9,3 +9,64 @@ extern crate gc_derive;
 pub mod exec;
 pub mod js;
 pub mod syntax;
+
+use crate::exec::{Executor, Interpreter};
+use crate::syntax::lexer::Lexer;
+use crate::syntax::parser::Parser;
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+extern "C" {
+    // Use `js_namespace` here to bind `console.log(..)` instead of just
+    // `log(..)`
+    #[wasm_bindgen(js_namespace = console)]
+    fn log(s: &str);
+}
+
+pub fn exec(src: String) {
+    let mut lexer = Lexer::new(&src);
+    lexer.lex().unwrap();
+    let tokens = lexer.tokens;
+
+    // Setup executor
+    let expr = Parser::new(tokens).parse_all().unwrap();
+    // print!("{:#?}", expr);
+
+    let mut engine: Interpreter = Executor::new();
+    let result = engine.run(&expr);
+    match result {
+        Ok(v) => print!("{}", v),
+        Err(v) => print!("Error: {}", v),
+    }
+}
+
+#[wasm_bindgen]
+pub fn evaluate(src: &str) {
+    let mut lexer = Lexer::new(&src);
+    match lexer.lex() {
+        Ok(_v) => (),
+        Err(v) => log(&v.to_string()),
+    }
+
+    let tokens = lexer.tokens;
+
+    // Setup executor
+    let expr: syntax::ast::expr::Expr;
+
+    match Parser::new(tokens).parse_all() {
+        Ok(v) => {
+            expr = v;
+        }
+        Err(v) => {
+            log("parsing fail");
+            return;
+        }
+    }
+
+    let mut engine: Interpreter = Executor::new();
+    let result = engine.run(&expr);
+    match result {
+        Ok(v) => log(&v.to_string()),
+        Err(v) => log("Error"),
+    }
+}

tests/js/test.js

@@ -1,2 +1,5 @@
-var a = new String("ABC");
+function a() {
-a.charCodeAt(-1);
+  return "jase";
+}
+
+a();

webpack.config.js

@@ -0,0 +1,25 @@
+const path = require("path");
+const HtmlWebpackPlugin = require("html-webpack-plugin");
+const webpack = require("webpack");
+const WasmPackPlugin = require("@wasm-tool/wasm-pack-plugin");
+
+module.exports = {
+  entry: "./index.js",
+  output: {
+    path: path.resolve(__dirname, "dist"),
+    filename: "index.js"
+  },
+  plugins: [
+    new HtmlWebpackPlugin(),
+    new WasmPackPlugin({
+      crateDirectory: path.resolve(__dirname, ".")
+    }),
+    // Have this example work in Edge which doesn't ship `TextEncoder` or
+    // `TextDecoder` at this time.
+    new webpack.ProvidePlugin({
+      TextDecoder: ["text-encoding", "TextDecoder"],
+      TextEncoder: ["text-encoding", "TextEncoder"]
+    })
+  ],
+  mode: "development"
+};